Cycle Performance Engineer - Turbomachinery

About Valar Atomics

At Valar Atomics, we're redefining what's possible in energy. Our mission is to make clean, high-temperature nuclear power scalable—unlocking abundant energy for industry, hydrogen, and next-generation manufacturing. We are a team of builders, engineers, and operators who believe nuclear energy should be fast to deploy, factory-made, and built for the real world. Our first pilot plant in Orangeville, Utah will demonstrate how advanced nuclear systems and fuel fabrication can power the future. Joining Valar Atomics means becoming part of a company where autonomy, ownership, and impact exist at every level.

The Team

As part of the Engineering organization, Power Con v ers ion develops the technologies that efficiently transform reactor-generated heat into usable electrical power . The team focuses on maximizing system performance, reliability, and commercial viability.

The Role

Valar Atomics is seeking a turbomachinery aerodynamics engineer to join the turbomachinery team and advance power generation capability. In this role, you’ll be responsible for the cycle performance modeling for cutting edge turbomachinery. You’ll be working with cross-functional team members to define a high efficiency, highly producible cycle design. As an early hire in turbomachinery, you will be able to directly influence design decisions on the system architecture.

Key Responsibilities

Develop and maintain a thermodynamic model of the power conversion system

Aggregate, interpret and integrate the contributions of component owners into the overall cycle model

Partner with turbomachinery, secondary flow, and heat exchanger owners to input their component performance into the system model

Define instrumentation plans to calibrate the cycle model to tested results

Evaluate system level trades to drive the cycle to the optimal business outcome

You Will Be Successful in This Role If

You are excited to be a part of a complex turbomachinery product from the beginning

You thrive in ambiguous environments without defined turbomachinery design best practices

You want to be part of turbomachinery design beyond a singular aerodynamic, structural or manufacturing perspective

Basic Qualifications

Bachelor's degree in Mechanical or Aerospace Engineering

3 years experience in analyzing thermodynamic cycles in a thermodynamic solver (NPSS, Aspen, GateCycle, Flownex, EES, etc.)

Preferred Skills and Experience

Master's degree in Mechanical or Aerospace Engineering

Experience with modeling closed cycles

Test experience with turbomachinery

Experience with supercritical C02

Experience analyzing turbomachinery at a component design level

What We Offer

Competitive base salary

Equity ownership in a rapidly growing advanced energy company

Comprehensive medical benefits

Unlimited PTO

Free daily lunch and dinner provided onsite

Generous PPE stipend

High-impact startup environment with significant ownership and autonomy

Opportunities for rapid career growth and internal advancement

Direct collaboration with experienced operators, engineers, and industry leaders

The opportunity to help build and scale transformative energy technology from the ground up

Equal Employment Opportunity Statement

Valar Atomics is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, age, disability, veteran status, or any other protected status under applicable law.

We are committed to providing a workplace free of discrimination and harassment and will provide reasonable accommodation as required by law.

Applicants must be legally authorized to work in the United States as a U.S. citizen or lawful permanent resident (green card holder). Salary $140,000 — $215,000 USD